/*
 * Copyright 2009 Bushel Project Members (http://bushel.googlecode.com/)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.googlecode.bushel.repo;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.apache.ivy.plugins.repository.Repository;
import org.apache.ivy.plugins.resolver.util.ResolverHelper;

public class RepositoryManifestIterable extends AbstractFSManifestIterable {

    private final Repository repo;

    /**
     * Default constructor
     * 
     * @param root
     *            the root directory of the file system to lookup
     */
    public RepositoryManifestIterable(Repository repo) {
        this.repo = repo;
    }

    @Override
    protected InputStream getInputStream(String f) throws IOException {
        return repo.getResource(f).openStream();
    }

    @Override
    protected List<String> listBundleFiles(String dir) throws IOException {
        return asList(ResolverHelper.listAll(repo, dir));
    }

    @Override
    protected List<String> listDirs(String dir) throws IOException {
        return asList(ResolverHelper.listAll(repo, dir));
    }

    private List<String> asList(String[] array) {
        return array == null ? Collections.<String> emptyList() : Arrays.<String> asList(array);
    }
}
